1 files changed, 62 insertions, 0 deletions
diff --git a/util/state.go b/util/state.go
new file mode 100644
index 00000000..29fca945
--- /dev/null
+++ b/util/state.go
@@ -0,0 +1,62 @@
+package util
+
+import (
+	"errors"
+	"github.com/shirou/gopsutil/process"
+	"github.com/spiral/roadrunner"
+)
+
+// State provides information about specific worker.
+type State struct {
+	// Pid contains process id.
+	Pid int `json:"pid"`
+
+	// Status of the worker.
+	Status string `json:"status"`
+
+	// Number of worker executions.
+	NumJobs int64 `json:"numExecs"`
+
+	// Created is unix nano timestamp of worker creation time.
+	Created int64 `json:"created"`
+
+	// MemoryUsage holds the information about worker memory usage in bytes.
+	// Values might vary for different operating systems and based on RSS.
+	MemoryUsage uint64 `json:"memoryUsage"`
+}
+
+// WorkerState creates new worker state definition.
+func WorkerState(w *roadrunner.Worker) (*State, error) {
+	p, _ := process.NewProcess(int32(*w.Pid))
+	i, err := p.MemoryInfo()
+	if err != nil {
+		return nil, err
+	}
+
+	return &State{
+		Pid:         *w.Pid,
+		Status:      w.State().String(),
+		NumJobs:     w.State().NumExecs(),
+		Created:     w.Created.UnixNano(),
+		MemoryUsage: i.RSS,
+	}, nil
+}
+
+// ServerState returns list of all worker states of a given rr server.
+func ServerState(rr *roadrunner.Server) ([]*State, error) {
+	if rr == nil {
+		return nil, errors.New("rr server is not running")
+	}
+
+	result := make([]*State, 0)
+	for _, w := range rr.Workers() {
+		state, err := WorkerState(w)
+		if err != nil {
+			return nil, err
+		}
+
+		result = append(result, state)
+	}
+
+	return result, nil
+}